<<Disclaimer: Verify this information before applying it to your situation.>>
Several have asked me what cake recipes do I use with the crumb
toppings. The answer is any and all. I use any cake recipe that calls
for cake flour. Then I use corn starch as a substitute. I even use
cornbread [with added sweetener] when I want it to travel well.
One thing I do, tho, is to add additional spices to the cake batter
itself. for example, if the topping has cinnamon and nutmeg in in, I
add about 1/2 teas cinnamon and a pinch of nutmeg to the batter. It
echos the flavor nicelly.
Ann